Objective To study the food intakes of Blattella germanica, Periplaneta americana, and Periplaneta fuliginosa and the effects of temperature and food types on their food intakes. Methods High carbohydrate food, high protein food, and high fat food were provided for the three species of cockroaches; the food intakes of cockroaches were observed at different temperatures, and the effect of temperature on food intakes was statistically analyzed. Results For common starch food (water content 5.70%), the average daily food intakes of each cockroach (mg/d ) at 8 ℃, 16 ℃, and 32 ℃ were as follows: 2.10±0.28, 8.47±0.57, and 8.69±0.58 for female B. germanica, and 1.76±0.67, 7.04±1.25, and 4.51±0.20 for male B. germanica; 25.78±1.31, 65.56±13.73, and 142.94±13.00 for female P. americana, and 17.67±5.31, 32.94±4.82, and 76.81±7.55 for male P. americana; 32.07±10.02, 46.90±8.42, and 92.46±7.77 for female P. fuliginosa, and 15.38±2.15, 17.21±2.26, and 50.61±3.05 for male P. fuliginosa. For B. germanica, the average daily food intakes (mg/d) of each late instar nymph, female adult, and male adult were as follows: 1.78±1.03, 1.06±0.61, and 0.50±0.29 for peanuts, 2.04±1.18, 1.54±0.89, and 0.58±0.34 for dried meat floss, and 2.53±1.46, 1.73±1.00, and 0.71±0.41 for red dates. Conclusion As temperature increases, the food intake of B. germanica first increases and then decreases, showing a parabolic pattern, while the food intakes of P. americana and P. fuliginosa increase linearly. B. germanica has the highest intake for high starch food, followed by high-protein food, and had the lowest intake for high-fat food; for each food, the food intake was the highest in late?instar nymphs, followed by female adults and male adults.